ECM Ch.6 — Post-IPO: Lock-up, Overhang, and Why the Real Story Starts After Listing
Listing isn't the end. Lock-up overhang chart: D+90 (anchor release), D+180 (PE + founder — the maximum supply bomb), D+365 (stock options). LG Energy Solution (success), WeWork withdrawal→bankruptcy, Kakao Bank -70%, Rivian -80%, DiDi's app deleted 48 hours after listing — global IPO case studies dissected into five failure types.
Ch.1
Lock-up Overhang — The Hidden Time Bomb After IPO
An IPO doesn't end on listing day. The real test begins afterward — particularly as lock-up expiration dates arrive. The public float at listing represents only 20–30% of total shares outstanding. The remaining 70–80% is held by PE sponsors, founders, executives, and anchor investors, whose selling restrictions (lock-ups) expire in sequential stages.
Lock-up overhang is the discounting effect that this future potential selling pressure exerts on the current stock price. The market already knows when and how many shares will become freely tradeable, and as lock-up expiration dates approach, downward pressure on the stock price intensifies.
Lock-up Overhang — Cumulative Float by Unlock Date (Schematic)
Institutional + retail allocation
90-day anchor obligation ends
Maximum risk event — 40%p of total supply released
Selling pressure if options are in-the-money
D+180 — Maximum Risk Event
D+180, when PE sponsor + founder + executive lock-ups expire simultaneously, is the highest stock price risk moment. PE sponsors in particular face significant pressure to sell at this point to begin recovering their invested capital. For popular IPOs, it is common to see stock prices 20–40% below their peak by the day before D+180.
"Lock-up expiry is the single largest risk event for a stock. If you're holding the stock the day before D+180, you'd better have a reason."
— Anonymous ECM Hedge Fund Manager
Ch.2
Success Case — Anatomy of Textbook Execution
To understand failure cases, we must first dissect the structure of a success case. LG Energy Solution's 2022 IPO was not simply a 'popular IPO' — it was textbook execution: pre-eliminating overhang, selecting the right investors, and reading market timing correctly.
Korea's Largest IPO — Success Formula
LG에너지솔루션
2022₩12.75T — Korea's largest IPO success formula
IPO size
₩12.75T
Institutional demand
2,023:1
Lock-up commitment
67%
12M post-listing
Held IPO price
Ch.3
5 Global IPO Failure Types — Case Anatomy
IPOs fail in many distinct ways. Pre-IPO withdrawal, immediate post-listing crash, long-term underperformance, SPAC fraud, regulatory retaliation — each type has different structural causes and advance warning signals. The six global cases below extract the lessons from each failure type.
WeWork
Largest IPO withdrawal ever — $47bn → Bankruptcy
Hoped-for valuation
$47bn
Revised before withdrawal
$10bn-
2021 SPAC listing
$9bn
2023 bankruptcy
Ch.11
Lessons
Ant Group
$37B IPO — cancelled 48 hours before listing by Chinese regulators
IPO size
$37bn
Target valuation
$315bn
Cancellation timing
48 hours before listing
Cause
Jack Ma criticizing regulators
Lessons
Rivian
Down 80% within 3 months of IPO — the EV bubble textbook
IPO price
$78
Day 1 high
$172 (+121%)
3 months later
$22 (-72%)
IPO size
$13.7bn
Lessons
Uber
Down 7.6% on Day 1 — largest loss in IPO history on Day One. Below IPO price for 2 years.
IPO price
$45
Day 1 close
$41.57 (-7.6%)
1 year later
$29 (-35%)
First profit
2023 (4 years post-IPO)
Lessons
Nikola
Hydrogen truck SPAC — fraud proven, CEO convicted, -99%
Peak post-SPAC valuation
$34bn
Current price
$0.3 (-99%+)
CEO verdict
Fraud conviction (2023)
Demo video reality
Truck rolled downhill (no engine)
Lessons
DiDi
App deleted 2 days after NYSE listing — delisted, -90%
NYSE listing
June 30, 2021
IPO size
$4.4bn
App deletion
2 days post-listing
Price change
$14 → $1.4 (-90%)
Lessons
Ch.4
Case Lesson Matrix — Risk Type × Early Warning
Every IPO failure follows a pattern. The matrix below consolidates the risk type, primary cause, early warning signal, and timing across all six cases. S-1 analysis, governance review, and regulatory relationship assessment — these three constitute the core due diligence framework for IPO investing.
Case Lesson Matrix — Risk Type × Early Signal
| Case | Type | Primary Risk | Early Warning Signal | Timing |
|---|---|---|---|---|
| WeWork | Pulled | Governance | S-1 related-party + supervoting | S-1 analysis |
| Ant Group | Regulatory Pull | Geopolitics | Regulatory tension disclosures | Pre-IPO |
| Rivian | Post-IPO Crash | Valuation bubble | Day 1 +121% pop + production miss | 1–3 months post-IPO |
| Uber | Long-term underperform | Path to profitability | Unit economics degradation + competition | 1–2 years post-IPO |
| Nikola | SPAC Fraud | No due diligence | Hindenburg short-seller report | 3–6 months post-SPAC |
| DiDi | Regulatory Retaliation | Geopolitics + data sovereignty | Ignored Chinese opposition + NYSE listing | 2 days post-IPO |
Common pattern: Every failure case had warning signals that were publicly disclosed in advance. S-1 analysis, governance review, and understanding regulatory relationships are the core due diligence for IPO investing. Look at the numbers and structure, not the narrative.
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Frequently Asked Questions
Key Terms
The supply pressure created by large blocks of shares that could be sold into the market after lock-up expiry. The mere expectation that insiders, PE funds, or anchor investors will soon sell causes the stock to decline in advance of actual selling. The psychology of 'sell before the supply bomb hits' drives price pressure ahead of the event. The D+180 day lock-up expiry for PE and founders is typically the largest overhang event.
The date on which insider share sale restrictions are lifted after an IPO listing. Typical schedules: anchor investors at D+90, PE/VC/founders at D+180 (maximum volume), and employee stock options at D+365. Stock prices tend to decline before expiry in anticipation, and actual selling after expiry adds further market pressure. Lock-up expiry is both a legal requirement and a defining event in post-IPO price action.
The act of the greenshoe agent (lead manager) purchasing shares in the open market below the offer price to support the stock during the 30-day stabilization window after listing. This intervention is conducted on behalf of both issuers and investors and is legally permitted under securities regulations. After the stabilization period ends, the stock is left to trade freely. Korea has a similar market-making mechanism.
The first investment research report published by the lead underwriter's analyst after the quiet period ends. Initiation of coverage attracts market attention and typically has an immediate impact on the stock price. Underwriters face inherent conflicts of interest and overwhelmingly issue Buy recommendations, but SEC Regulation AC requires analysts to certify the independence of their views. High-quality coverage sustains institutional investor interest in the stock after listing.
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